Packing cylinder slide sheet



Oct. 2, 1951 w. H. FORT PACKING CYLINDER SLIDE SHEET 2 Sheets-Sheet 1 Filed Feb. 5, 1948 Oct. 2, 1951 w. H. FORT 2,569,467

PACKING CYLINDER SLIDE SHEET Filed Feb. 5. 1948 2 Sheets-Sheet 2 PEG-6 INENTOR.

wh ch Weber .naperiis ted throu h p i tin the e tinenc t a D e to vthe eet th h e rr eeeee Patented Oct. 2, 1951 r vayton, Q fpJ assisnq .95 $9 .12-

ar .E ta sell,

Application z-Eehl uary 5, 14943, SerialzNo.., 540

- Thi .i vt e re ates t9 the p nt n tertezli e ne e l site ielee sityne i an slip a e sakes .-mQr par-tieu1a ly;t th :Pfifikil sweet fused 1 pleee- @the 'packi ge l nde so as to melo s; i Q l Ql QE t3 $;tzmtoiilenfi hen n a ei et a 95 emek e nsier-t etne mite 'lmrotary p int n presses the per nliereleenees N (of. the pr n surface of the :Qrin in 2? a e substantially the sam a the e iphem e eQ f :the web or paper r eivin the ,i re

1- tion into contact with the packing eminder. {t n ideal situation would e the same zne .zspeedrof thelprintingsurfac ;Qftnep ti t as-thespeedtofthe web fed by t egoa :der. This situation, :howeJ er, lq i lno 3: t or the reasonthatthe nri tin surfne q itnep t- A, i eplatedoes noteforma t ue .cyli rlea'c eu :Some portions .of the print ng plate ;are l and others may project outwardly in 9 r de r tp 1;- tain the proper .,gr;adati on;of sl 1ag1ing.

In order to obtain the desi ed emphasi tween :hi li ht [areas and s aded a as th reproduction of :an eleetrotype, the

$1. 9 sen- E e rin r P -.19 erl ng tl e -N lenieare face-treated, as iorexample, iby thenlse 41 A the ob ect of h s nve t n is to nrpyid make-ready vmats ;-sho.wn ran nesen ee i tile yex e t e u rtx the peekin ylinqe yela- Bishop Patent No. 2,256,921 issued SeptempgrQB, 25 tnattneresi'stance to rn oveinent of the wet np'on 19471, f r Mak -n arly- 2l..n .p -te. 0;f" ,h.e-.f@ hat he eeki ey f e. han t st q :the difference in diameter of @yarions 'to xiiovemntbetween tlre web' antlthe printing of the printing surface of tl e eleetrotypej not surfaceincontact with the -webjso as-to c'ausetl i'c every great, it is sufiicient to ca11 s tbmgerigh a1 -web=tomove-wi th the printingsurf ace. 3o Another object'of thisinv ention is to projide a floating sheet having unrestrained 'f-limiteo. -movements -on the packing cylinder.

Another: object :of this invention is to provisiong packing sheet ier-Mme packing cylinder, which packing :sheetrestsmpona lubricant' Other objects and advantages reside in athe construction of parts, the combination thereof v v i. a t .and-themodeiof operation, as .will become more ,faster than the average w locity-pf ,l h e tapparenteinom :the following description. rface of the electroty pe and raster t1 n e 0 zRfifelring @to itneidrawines. Fi ure 1 shomska peri e s e d o th pe kin eylinder- .A -.cross.sec.tiqna1eviewpfithe Packing icx inderihait- Jeeneequenee, if the Web nm tt d line a flo t n support l nounted -.the1ceon zundel'r e the ki te inder but .11 yin an intin tesflilltle lsmwnsc iema ica lysior e packing in er re z l tbe-e. sthe-pn osep .1. t p g be w n h i ei t n ne tie eieil :F ll 'te :i LB t et ye 19$ floating Itroty and t e webr sults i Nelsen rapid-Wear of theseportionsiof the g1 e t d mete :t mv tat-tile hi he teamed, tth rmcre the por t ne eer e link, i te n rea il be ee n 4 h t .ivbu d e a com a atively easy matter slight slippage :to fltalge ,place b' ltret e -I' d h webt n th th a, pgrsp egtifle'dilfiw similar 3 0 Fi ure tion ionholdmm: s a lubr can ,liq ever thj the i ma als inn en a erete seri l,qten ng teier nsm wn gmj e s Figure 7 is a longitudinal cross sectional view of another modification.

In the drawings, the reference character 10 indicates a packing cylinder mounted upon a shaft l2 in a printing press, not shown. Adjacent the packing cylinder ID are found one or more printing cylinders [4, only one of which has been shown. The circumference of the packing cylinder is an even multiple of the circumference of the printing cylinder, so that the printing cylinder makes one, two, three or four revolutions for each revolution of the packing cylinder, depending entirely upon their'relative sizes. The packing cylinder contains one or more slots IE, only one of which has been shown in Figure 1. The slot [8 terminates in a cylindrical recess [8, having mounted therein a shaft. 20. shaft is provided with a notch into which is seated a clamping bar 22. This clamping bar 22 cooperates with a shoulder 24 to clamp a flange 26 of the packing material, consisting of the sheets 28 and 38.

As may best be seen by referring to Figures 2 and 3, the sheet 28 is provided with a transverse slot 32. The sheet 30 is provided with a tapered end 34 that extends through the slot 32. The end 340. of the sheet 38 extends under the sheet 28. The sheet 28 is provided with a tapered end 36 that is positioned in the slot in the shaft 4! mounted in a cylindricalrecess 42 in the packing cylinder [0. The shaft may be rotated, so as to tension the sheet 28, causing the sheet 28 to lie flat against the surface of the packing cylinder in a taut manner. the sheet 28 are clamped in position, one by the head clampincluding the bar 22, the other by the tail or'rear clamp including the slotted shaft 40. The sheet 3!! may bereferred to as a floating Thus, both ends of This sheet, in that it is not tensioned and is permitted to havefa limited circumferential movement.

"rhis'movmem may be quite small, on the order .of a few thousandths of an inch.

The" web 58, shown schematically, rests upon the floating sheet 3|] when passing under the printing cylinder 14. Due to the fact that the floating sheet 30 is not tensioned, it readily slides upon the sheet 28, so that whenever the peripheral speed of the contacting printing surfaces differs from the peripheral speed of the packing cylinder during the period of time thatthe sock is applied to the printing area in contact with the web, the floating sheet allows the web to move with the printing plate and at the same velocity, thereby reducing wear on the project- -ing portions of the electrotype while in printing position.

In order to aid the floating movement of the sheet 30 upon the sheet 28, the surface of the sheet 28 mayv be coated with powdered graphite functioning as a lubricant for the sheet 30. The floating sheet 30 relieves some of the strain on both the head and tail clamps, in that the floating sheet absorbs the shock caused byvariable peripheral speeds of the printing surfaces. This 4 of the circumference of the packing cylinder to the circumference of the printing cylinder.

In the event the sheet 30 is too tight, it will gradually 'loosen, in that the tab or tongue underlying the portion of the packing sheet 28 will slip out sufficiently to provide the necessary slack. On the other hand, if the sheet 38 is toe loose, an additional portion of the sheet may be gradually forced through the slot 32. The flanges 28 of the sheets 28 and 30 are carefully cemented together, so that the one end of both sheets will be rigidly held in position.

Instead of using the slot 32, a sheet 60, shown in Figures 4, 5 and 6, may be mounted upon the packing cylinder. Overlying the sheet 6 is a floating sheet 62. Both the sheets 86 and 62 are provided with flanges cemented together and cooperating to form a flange 64 adapted to be clamped in position. The sheet 62 is shorter than the sheet 68. The free end 68 of the sheet 62 preferably projects into a loop of a rubber band 10, loosely holding the end of the sheet 62 in position. The thickness of the rubber band II and the thickness of the sheets have been greatly exaggerated for the sake of clarity. The rubber band I9 is positioned in such a manner that the rubber band is located in the margin of the printing plate, so that the thickness of the rubber band will have no direct influence upon the printed matter.

The function of the rubber band is to hold the trailing end of the floating sheet against the packing cylinder so as to prevent the trailing end from whipping outwardly due'to centrifugal force when the floating sheet is out of contact with the web and to hold the floating sheet in position when preparing the printing press for another run.

In this modification, as well as the preferred modification, the top sheet 62 is free to have limited movement in any direction, in that it is not tensioned upon a roughened surface of a packing cylinder, but instead, is mounted in contact with the smooth surface of the underlying sheet.

Referring to the modification disclosed in Figure 7, the bottom sheet 80 corresponds to the sheet 60. The top sheet 82 has a downwardly projecting flange attached to a like flange of sheet 80, the two flanges cooperating to form a clamping flange 84, adapted to be clamped into position on the packing cylinder. The portion 86 along the end of the sheet 82 is folded under the sheet 82 and is cemented to the underlying sheet 80, the cement terminating in short spaced relation from the fold. This is to permit the sheet 'two sheets, that is, a base sheet and a superimposed floating sheet, a single sheet may be used having the leading edge rigidly clamped in the head clamp and the trailing end held in the tail clamp, the tail clamp being resilienty urged into tightening position by a torsional spring similar to a spring used in a window shade, which spring yields to permit'the base sheet to slide on the packing cylinder whenever the contacting printing surface of the printing cylinder travels at a amass-r ihigher speed :than the peripheral speed of tp cking :cylinder, :to sthereby :permit :the web it! trayeltwith .the l-contacting :su-rf ace of ithe'printin plate, ;rather than ;,to .-.cause -.a slippage between -theplate and the-web.

Although the preferred embodiment LQf the 11116- evicehas.beendescribedlit-willibe1understood that within the purview .of this invention :yarimi changes may .be made .in the. term, details, pm.- n tionland arrangement of parts, itheicomh naanon-thereof and mode otoper tion. which teenterallysstated consist ;in a devic callable of trying out :the biects s tior h, as d sc o ed nd idefinedinsth za p nded claims,-

. l-Having t usdescrib d inyinvsntion .1 c aim:

11- {A p ckinsshe t:assemb yl r us one nachzi l c ind r .o a printinsnress, saidna ki gm :incler .b p o ded with-a head-s a s and a mil clamp, said. pack n shee ass mbly includin a i-base sheet havin {a .flanee adap ed t be clamnedi t dQ amP o the hackin c l nidensa d base sh tha metata e edrtrailin en redacted to clam ed the ta clamp of the ;packing cylinder, a traveling sheetoverlying at least a po rtion. of the base sheet said traveling :shee h n a an e tending innaralle n ,1, tion to the flange of the-,base sheet and clamped in the ,head clamp, ;the length ,of .said traveling .sheet being less thanthe lengthotthe basesheet, the-thickness of the packin heet throughout {the usable GXIJOSBd DOllJiOl'l-Dll the ,packing cylin- ;der being substantially constant, ,means for releasably securing the trailing end of the second gsheetto the base sheet so as to permit limited 6. etween the :ends :oitheifloatingsheet so as to -pe unit :iree movement of the portion ;of the floatin 38116.91 located between theendsthereof.

:A. nlnaekingsheetassemmy ;f.or.use ona pa king lcylinder of ,a printing press having a printing cylinder, said packing :cylinder being :prosvided. avithia head clamp and a tail clamp, said snacking sheet assembly including a base sheet :having .a lflange .adapted to be clamp in the head clamp .of the packing ,cylinder, said base l'sheet having ;a tapered :trailing end adapted to @be clampedin the tail .cla-mp of the packin cy iinder, la floating sheetoverlying the base sheet, saidfioating sheet having one end thereof fixed- ,ly attached 130 the base sheetand the other end thereof loosely held on ,the base sheet providing aslackaportion between the ends of the floating-sheetso as to permit .free movement of the tpor-tionbf theifioatins sheet located between h ends thereof, .and/allubricantin erpo ed be ween :the base sheet and the floating sheet .to permit .thelfloatinssheet to shift relative to heb s :sheet.

5. .A packing sheet assembly for use on a ack- :ing; cylinder of a printing press having a printing .cyl-inder, said. packing cylinder being provided with a. headclamp and'a tail clamppsaidpacking sheet assembly including a base :sheethavinga -fiange adapted to be clamped in theheadclamp lot the packing cylinder, said base sheet having a tapered .trailing end adapted to be .clamped in :the stall; clamp of the packing cylinder, .2. .fioating lsheet overlying the base sheet, saidfioating sheet shaving :oneend thereof fixedly attached to the -movement of the Sewn-d Sheet "with respect cbasesheetandthe otherend thereof loosely held :the base sheet.

i ,2. VA packing sheet assembly for useona pack- .ingbylinder of a printing press having ,a printin g cylinder, said packing cylinder being pro.- yided with a head clamp anda tailclanlnsaid packing sheet assembly including a base sheet -having a flange adapted to be. clamped in the head ,blamp ,of the packing cylinden said base sheet filming a tap red aili g nd adap d t be --flc,lampedin the tailclarnp of the packingcylinder, said basesheet having a transverse ,slotnearthe .ta'ilend thereof, a fioatingsheet overlying a per.- tion of the base sheet, sai fiOatingsheetfhaving .a a ge exte ding in parallel relati n to t e flange of thebase sheetand clamped in thef'head .c' amnithe t ail do th f o tin she t projecting through the transverse slotin the base ,sheetso as 'to'have a portion underlying the tail 'portionofthebase sheet, theportion of the floating sheet located between the head clamp and *theslot'being provided with a slack "so as to permit a limited movement to accommodate variaztionsin-the peripheral speed of t'heprintingsur- "face of-the printing cylinder.

-A packing sheet assembly tor-use on apack- 'ing cylinder of a printing press "having a print- -ing cylinder, said packing cylinder being provided with ahead-clamp and a -tail clamp,"said packing sheet assembly including 'a base sheet on the base sheet providingla slack portionbeztyveen ,-the;ends 19f thel-floating sheet so as to peranititreemovementof theportion of the floating zsh et oca ed b we the d -t e o an finel po d ed ra hit nt rpos d between h ba sheet and the floating sheet tunctioning as a lubricant so ;as to permit the floating sheet to *easily slide uponthe base sheet.

A bac ing cylinde e b r s in a printing press such as a multi-color printing hressp cv dedyvithprint n cyli de s, said ba ns= yli .der as embly in lu n a packing cylnder, a packin she t assem ly .in udinea base sheet m eans for renew/ably attaching the base she t tct e r'packinszcylinder, the mai o y vQ the base ,sheet having substantially the same .l.c rvatm: ..zas the u v ture of the pa ki y inder, a ;floating; sheet, means for securing one gend fthe floating-sheetadjacent one end of the base :she means .f r lea ab1y attachin th :Qt hQ end of th :fibatin sheet to the base sh t near ltheioppcsite end thereof, the floatin sheet l'having .a curvaturecorresponding to the curva- -ture;of1the :main body of thebase sheet, there ebeing arslackdnuthecurved portion of the floating sheet :between theattachedends thereof so as ;to-.;permit a limited movement to accommodate variations in the peripheral speed of .the printing surface .of the printing cylinder.

7... A ipacking cylincler assembly for use in .a :printing press such as a multi-color printing press provided :with a printing cylinder, said packing cylinder assembly including a packing end thereof loosely held on thecurvecl portion dfthe base-sheetyproviding a slac'k por-tion becylinder, a packing sheet assembly including a base sheet, means for removably attaching the "base sheet '-to -the :packing cylinder, a floating -sheet, means for securing one end of thefloating sheet-adjacent one end of the base sheet, means "%01 releasablyattaching the other end of the floating sheet to the base sheet near the opposite end thereof, there being a slack in the floating sheet between the attached ends thereof so as to permit a limited movement, and a lubricant interposed between the slack portion of the floating sheet and the base sheet.

8. A packing cylinder assembly for use in a printing press such as a multi-color printing press provided with a printing cylinder, said packing cylinder assembly including a packing cylinder, a packing sheet assembly including a base sheet, means for removably attaching the base sheet to the packing cylinder, a floating sheet, means for securing one end of the floating sheet adjacent one end of the base sheet, means for releasably attaching the other end of the floating sheet to the base sheet near the opposite end thereof, there being a slack in the floating sheet between the attached ends thereof so as to permit a limited movement, and finely powdered graphite interposed between the slack portion of the floating sheet and the base sheet to provide a lubricant for the floating sheet so as to permit a limited movement thereof to accommodate variations in the peripheral speed of the printing surface of the printing cylinder.

9. A packing sheet assembly for use on a packing cylinder of a printing press having a printing cylinder, said packing sheet assembly including a base sheet attached to the periphery of the packing cylinder in a taut position, a floating sheet overlying the base sheet, means for fixedly attaching one end of the floating sheet to the base sheet, and means for releasably attaching the other end of the floating sheet to the opposite end of the base sheet, said floating sheet having a slack portion between the ends thereof so as to permit free movement of the slack portion to accommodate variations in the peripheral speed of the printing surface of the printing cylinder.

10. A packing sheet assembly for use on a packing cylinder of a printing press having a printing cylinder, said packing sheet assembly including a base sheet, means for attaching the ends of the base sheet in a taut relation upon the periphery of the packing cylinder, the main body of the base sheet having a curvature substantially equal to the curvature of the packing cylinder, a floating sheet overlying the base sheet, the floating sheet having a curvature corresponding to the curvature of the main body of the base sheet, means for fixedly attaching one end of the floating sheet to one end of the base sheet, means for releasably holding the other end of the floating sheet to the opposite end of the base sheet, said floating sheet having a slack portion between the ends thereof so as to permit free movement of the slack portion to accommodate variations in the peripheral speed of the printing surface of the printing cylinder.

11. A packing sheet assembly for use on a packing cylinder of a printing press having a printing cylinder, said packing sheet assembly including a base sheet attached to the periphery of the packing cylinder in a taut position, a floating sheet overlying the base sheet, means for fixedly attaching one end of the floating sheet to the base sheet, means for releasably holding the other end of the floating sheet to the opposite end of the base sheet, said floating sheet having a slack portion between the ends thereof, and a lubricant interposed between the slack portion -of the floating sheet and the base-sheet so as to '8 permit free movement of the slack portion to accommodate variations in the peripheral speed .of the printing surface of the printing cylinder.

12. A packing sheet assembly for use on a packing cylinder of a printing press having a printing cylinder, said packing sheet assembly including a base sheet attached to the periphery of the packing cylinder in a taut position, a floating sheet overlying the base sheet, means for fixedly attaching one end of the floating sheet to the base sheet, means for releasably holding the other end of the floating sheet to the opposite end of the base sheet, said floating sheet having a slack portion between the ends thereof, and flnely powdered graphite interposed between the slack portion of the floating sheet and the base sheet to provide a lubricant for the floating sheet so as to permit a limited movement thereof to accommodate variations in the peripheral speed of the printing surface of the printing cylinder.

'13. A packing sheet assembly for use on a packing cylinder of a printing press having a printing cylinder, said packing sheet assembly including a base sheet, means for attaching the ends of the base sheet in a taut relation upon the pe-- riphery of the packing cylinder, a floating sheet overlying the base sheet, means for fixedly attaching one end of the floating sheet to one end of the base sheet, means for releasably holding the other end of the floating sheet to the opposite end of the base sheet, said floating sheet having a slack portion between the ends thereof so as to permit free movement of the slack portion to accommodate variations in the peripheral speed of the printing surface of the printing cylinder, and a lubricant interposed between the slack portion of the floating sheet and the base sheet so as to permit free movement of the slack portion to accommodate variations in the peripheral speed of the printing surface of the printing cylinder.

14. A packing sheet assembly for use on a packing cylinder of a printing press having a printing cylinder, said packing sheet assembly including a base sheet, means for attaching the ends of the base sheet in a taut relation upon the periphery of the packing cylinder, a floating sheet overlying the base sheet, means for fixedly attaching one end of the floating sheet to one end of the base sheet, means for releasably holding the other end of the floating sheet to the opposite end of the base sheet, said floating sheet having a slack portion between the ends thereof so as to permit free movement of the slack portion to accommodate variations in the peripheral speed of the printing surface of the printing cylinder, and finely powdered graphite interposed between the slack portion of the floating sheet and the base sheet to provide a lubricant for the floating sheet so as to permit a limited movement thereof to accommodate variations in the peripheral speed of the printing surface of the printing cylinder.

15. A packing sheet assembly for use on a packing cylinder of a printing press having a printing cylinder, said packing cylinder being provided with a head clamp and a tail clamp, said Packing sheet assembly including a base sheet having a flange adapted to be clamped in the head clamp of the packing cylinder, said base sheet having a tapered trailing end adapted to be clamped in the tail clamp of the packing cylinder, and a floating sheet overlying the base sheet, said floating sheet having one end thereof fixedly attached to the base sheet. and a rubber band encircling the base sheet near the opposite end thereof, the other end of the floating sheet projecting under the rubber band so as to be loosely held on the base sheet providing a slack portion between the ends of the floating sheet to permit free movement of the portion of the floating sheet located between the ends thereof.

16. A packing sheet assembly for use on a packing cylinder of a printing press having a printing cylinder, said packing cylinder being provided with a head clamp and a tail clamp, said Packing sheet assembly including a base sheet having a flange adapted to be clamped in the head clamp of the packing cylinder, said base sheet having a tapered trailing end adapted to be clamped in the tail clamp of the packing cylinder, the main body of the base sheet having a curvature substantially equal to the curvature of the packing cylinder, and a floating sheet overlying the base sheet, the floating sheet having a curvature corresponding to the curvature of the main body of the base sheet, said floating sheet having one WILLIAM H. FORT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,127,680 Replogle Feb. 9, 1915 1,408,531 Potter Mar. 7, 1922 2,329,830 7 Crafts Sept. 21, 1943 FOREIGN PATENTS Number Country Date 232,882 Great Britain Apr. 30, 1925 

